Abstract: A solid-state battery cell includes an anode electrode comprising an anode current collector, anode active material, a solid electrolyte, and a gel polymer electrolyte. A cathode electrode comprises a cathode current collector, a cathode active material, a solid electrolyte, and the gel polymer electrolyte. A separator layer comprises the gel polymer electrolyte and a solid electrolyte composite including a solid electrolyte coating arranged on an outer surface of an oxide core.

Abstract: An oxide-based solid-state battery cell includes a cathode electrode comprising a cathode current collector. A cathode active layer is arranged adjacent to the cathode current collector and comprising cathode active material that exchanges lithium ions and a solid oxide electrolyte and an in-situ polymerization gel. A separator layer comprises a solid oxide electrolyte, a porous layer, and the in-situ polymerization gel. An anode electrode comprises an anode current collector, a silicon film, and the in-situ polymerization gel.

Abstract: A solid-state battery cell includes a cathode electrode includes a cathode current collector and a cathode active layer arranged on the cathode current collector and including cathode active material and a solid electrolyte. A separator layer comprises the solid electrolyte. An anode layer comprises an anode current collector and a silicon layer arranged on the anode current collector and including a plurality of concave spherical surfaces.

Abstract: A method for preparing an electrolyte layer supported by a dry process electrode layer, the method includes providing a sulfide electrolyte layer; providing a first dry process electrode layer; arranging a first side of the sulfide electrolyte layer adjacent to a first side of the first dry process electrode layer; and calendaring the sulfide electrolyte layer and the first dry process electrode layer to reduce a thickness of the sulfide electrolyte layer to a predetermined thickness in a range from approximately 5 micrometers (?m) to approximately 50 ?m.

Abstract: An electrode for a lithium-ion battery cell includes a first region having a first thickness and including an active material comprising a first wt % of the first region and a solid electrolyte comprising a second wt % of the first region. A second region has a second thickness and includes the active material comprising a third wt % of the second region and the solid electrolyte comprising a fourth wt % of the second region. The first region and the second region are arranged adjacent to one another. The first wt % is greater than the third wt % and the second wt % is less than the fourth wt %.

Abstract: A solid-state battery cell includes an anode electrode comprising an anode current collector and an anode coating. A cathode electrode comprises a cathode current collector and a cathode coating, wherein the anode electrode and the cathode electrode exchange lithium ions. A separator layer is arranged between the anode electrode and the cathode electrode. A first capacitor electrode is arranged at least one of between the anode coating and a first side of the separator layer, between the anode coating and the anode current collector, between a second side of the separator layer and the cathode coating, and between the cathode coating and the cathode current collector.

Abstract: A functionalized separator for a battery cell includes a separator layer including a first side and a second side. A functionalized layer is arranged on at least one of the first side and the second side of the separator layer. The functionalized layer comprises a lithium-ion conducting solid electrolyte and a capacitor active material.

Abstract: A battery cell including an anode electrode layer including an anode active material. A cathode electrode layer comprises cathode active material. A solid electrolyte layer is arranged between the anode electrode layer and the cathode electrode layer. An elastomeric layer is arranged between the anode electrode layer and the solid electrolyte layer.

Abstract: A state of charge (SOC) balancing system includes: first and second batteries; first and second capacitors; an SOC module configured to determine first and second SOCs of the first and second batteries, respectively; and a switching module configured to selectively, when the first SOC is greater than the second SOC: (i) electrically connect the first and second capacitors in parallel; (ii) electrically connect the first battery to the first and second capacitors while the first and second capacitors are electrically connected in parallel; (iii) electrically disconnect the first battery from the first and second capacitors; (iv) electrically connect the first and second capacitors in series; (v) electrically connect the second battery to the first and second capacitors while the first and second capacitors are electrically connected in series; and (vi) electrically disconnect the second battery from the first and second capacitors.

Abstract: An electrochemical cell that cycles lithium ions includes a positive electrode that includes a positive electroactive material, a negative electrode that includes a negative electroactive material, and a free-standing separating layer disposed between the positive electrode and the negative electrode. The free-standing separating layer includes a gel membrane that includes a polymer host and a liquid electrolyte and an integrated structural component disposed within the gel membrane. The integrated structural component may be selected from the group consisting of: a plurality of solid-state electrolyte particles, a nonwoven material, and a combination thereof.

Abstract: An anode-free electrochemical cell that cycles lithium ions includes a positive electrode assembly having a positive current collector and a positive electroactive material layer, a negative current collector that includes a surface configured to receive a negative electroactive material after one or more formation cycles of the anode-free electrochemical cell, and a separating layer disposed between the positive electroactive material layer and the surface of the negative current collector. The separating layer includes an electrolyte that includes greater than or equal to about 20 wt. % to less than or equal to about 99.5 wt. % of a concentrated electrolyte having a lithium salt concentration greater than or equal to about 2 M to less than or equal to about 6 M, and greater than or equal to about 0.5 wt. % to less than or equal to about 80 wt. % of an ionic liquid.

Abstract: A modular bipolar solid-state battery includes T solid-state battery modules, where T is an integer greater than one. Each of the T solid-state battery modules includes an enclosure, a first terminal arranged on a first side of the enclosure, a second terminal arranged on a second side of the enclosure opposite to the first side of the enclosure, and N solid-state battery cells arranged and interconnected in the enclosure, where N is an integer greater than one. The T solid-state battery modules are connected in at least one of series and parallel. A positive terminal of the modular bipolar solid-state battery is connected to at least one of the T solid-state battery modules. A negative terminal of the modular bipolar solid-state battery is connected to at least another one of the T solid-state battery modules.

Abstract: A battery cell includes a cathode electrode comprising a cathode coating arranged on a cathode current collector and a separator. A dual function interlayer comprising capacitor material and lithium-ion source material is arranged one of between the cathode coating and the cathode current collector and between the cathode coating and the separator. An anode electrode is arranged adjacent to the separator and comprising an anode coating arranged on an anode current collector.

Abstract: A method for testing a sample of a battery cell includes arranging the sample of the battery cell in a sample pan of a test crucible; arranging a spacer on the sample of the battery cell; sealing the sample pan; and performing differential scanning calorimetry (DSC) testing of the sample.

Abstract: A method for manufacturing a gel membrane for a battery cell includes supplying a first substrate to a first roller; heating a gel membrane solution in a tank, wherein the gel membrane solution includes a polymer and a liquid electrolyte comprising one or more lithium salts; arranging a slot die within a predetermined distance of the first substrate located on the first roller; pumping the gel membrane solution into an inlet of the slot die; depositing a gel membrane layer from an outlet of the slot die onto the first substrate supported by the first roller; and cooling the gel membrane layer on the first substrate.

Abstract: A bipolar battery cell includes a bipolar electrode including a bipolar current collector and a cathode electrode arranged on one side of the bipolar current collector. The cathode electrode includes cathode active material for exchanging lithium ions, a first solid electrolyte, and first polytetrafluoroethylene (PTFE) fibrils. An anode electrode is arranged on an opposite side of the bipolar current collector, wherein the anode electrode includes anode active material for exchanging lithium ions, a second solid electrolyte, and second PTFE fibrils.

Abstract: An anode electrode includes a current collector and a first anode layer arranged on the current collector and comprising first anode active material. A first pre-lithiation layer is arranged on the first anode layer. A second anode layer arranged on the first pre-lithiation layer and comprising second anode active material.

Abstract: A battery cell includes an anode electrode comprising a first current collector. Anode active material is arranged on a first surface of the first current collector and is configured to exchange lithium ions. The anode active material comprises silicon. Empty spaces are formed in the anode active material in a predetermined pattern. A solid electrolyte layer is arranged adjacent to the anode electrode. A cathode electrode comprises a second current collector and cathode active material configured to exchange lithium ions and arranged adjacent to the solid electrolyte layer.

Abstract: An electrochemical cell includes a first electrode that includes a first current collector and a first electroactive material layer disposed on or near the first current collector, a second electrode that includes a second current collector and a second electroactive material layer disposed on or near the second current collector, and a separating layer disposed between the first electroactive material layer and the second electroactive material layer. The second electroactive material layer includes a plurality of hierarchical silicon columns, each of the hierarchical silicon columns has a longest dimension perpendicular to a major axis of the second current collector. The second electroactive material layer also includes a carbonaceous network that at least partially fills interstices defined between hierarchical silicon columns of the plurality of hierarchical silicon columns. The carbonaceous network includes linked carbon atoms that define a plurality of pores.

Abstract: A hybrid electrochemical device including at least two electrically connected solid-state electrochemical cells is provided. Each electrochemical cell includes a first outer electrode having a first current collector and a first electroactive layer, a second outer electrode having a second current collector and a second electroactive layer, and one or more intervening electrodes disposed between the electroactive layers. At least one of the intervening electrodes includes one or more capacitor additives. The first outer electrode is electrically connected to at least one of the intervening electrodes in a first electrical configuration. The second outer electrode is electrically connected to at least one of the intervening electrodes in a second electrical configuration. The at least two electrochemical cells are electrically connected in a third electrical configuration.